Sink



FIG. 1 is a front, top perspective view of my new sink design;

FIG. 2 is a plan view thereof;

FIG. 3 is a bottom end view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof. 

The ornamental design for a sink, as shown and described herein. 